Someone found this blog by doing a search for: should i pop fever blister?
If anyone else has arrived at this blog and, specifically, this post by typing in those words, I feel compelled to give you an answer. My answer is DON'T TOUCH IT!
Also, don't cross your eyes because they'll stay that way. Stop making that face or it will freeze like that. Don't touch yourself or you'll go blind. And, wine after beer will make you go queer.